<?php
$paged = $_GET['paged']; //( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
$nextPage = $paged + 1;
$args = array(
    'paged' => $paged,
    'post_status' => 'publish',
    'post_type' => 'entertainment',
    'posts_per_page' => 10,
    'tax_query' => array(
        array(
            'taxonomy' => 'entertainment_cat',
            'field' => 'slug', //can be set to ID
            'terms' => array('videos', 'jokes') //if field is ID you can reference by cat/term number
        )
    )
);
$custom_query = new WP_Query($args);
if ($custom_query->have_posts()) {
    while ($custom_query->have_posts()) : $custom_query->the_post();
        ?>
        <?php get_template_part('content', 'entertainment'); ?>  
    <?php
    endwhile;
    wp_reset_query();?>
<a class="load_more_content" href="javascript:void(0);"  onclick="loadMore('<?php echo $nextPage; ?>','ajax-entertainment');">load more...</a><?php }else {?>
<span class="load_more_content">no more content.</span>
<?php }